Nortel DMS-100 Series General Description Manual page 24

1-8 DMS-100 ringing overview
Harmonic ringing
The following figure illustrates the relationship of the harmonic ringing signals
with the ringing cycle.
Figure 1-5 Harmonic ringing
FrequencyA
(1 party)
FrequencyB
FrequencyC
FrequencyD
ANI/coin
Note: Available frequencies are 16-2/3, 25, 33-1/3, 50, and 66-2/3 Hz. Any
four of these, in any order, can be assigned to frequencies A through D.
Decimonic ringing
The following figure illustrates the relationship between the decimonic ringing
signals and the ringing cycle.
Figure 1-6 Decimonic ringing
FrequencyA
(1 party)
FrequencyB
FrequencyC
FrequencyD
ANI/coin
297-1001-131 Standard 06.01 October 2000
0 1 2 3
2 2 5 5 H H z z
1 1 . . 9 9 5 5 s s
3 3 3 3 - - - -1 1 / / 3 3 H H z z
(seenote)
1 1 . . 3 3 5 5 s s
(Any available slot)
0 1 2 3
0 1 2 3
3 3 0 0 H H z z
1 1 . . 9 9 5 5 s s
4 4 0 0 H H z z
(seenote)
1 1 . . 3 3 5 5 s s
(Any available slot)
0 1 2 3
6 s
4 5 6 7 8
5 5 0 0 H H z z
1 1 . . 3 3 5 5 s s
4 5 6 7 8
6 s
4 5 6 7 8
5 5 0 0 H H z z
1 1 . . 3 3 5 5 s s
4 5 6 7 8
9 10 11
6 6 6 6 - - - -2 2 / / 3 3 H H z z
1 1 . . 3 3 5 5 s s
9 10 11
9 10 11
6 6 0 0 H H z z
1 1 . . 3 3 5 5 s s
9 10 11